mobile

Ok, so yesterday i was trying to flash a custom rom on my Fame DUOS s6812i, the phone wasn't rooted or anything, so i did the process of rooting and everything via odin following the tutorial in this thread http://forum.xda-developers.com/show....php?t=2582851 and when i flashed the files for root and the recovery i got stuck in a bootloop, now i cant start the phone (obviously), i have no access to the recovery, all i can do is enter the download mode, So i tried to flash the stock firmware with odin and i keep getting this error:
<ID:0/005> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> S6812DDAMG3_S6812ODDAMG3_S6812DDAMF1_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/005> Odin v.3 engine (ID:5)..
<ID:0/005> File analysis..
<ID:0/005> SetupConnection..
<ID:0/005> Initialzation..
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> SingleDownload.
<ID:0/005> boot.img
<ID:0/005> NAND Write Start!!
<ID:0/005> recovery.img
<ID:0/005> BcmCP.img
<ID:0/005> FAIL!
<ID:0/005>
<ID:0/005> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
And in the screen of the phone shows twice this message : Secure: Signature Verification failed
Honestly i dont know what to do now, Kies just keep connecting and telling me to reset the phone, odin gives me this message, tried flashing kernel and recovery and it does not works, ive tried with 3 different firmwares from sammobile and the same. PLEAAAASSSEEEE! help me im kinda losing it over this and i dont know what to do.